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  • freemarker报错之九

    1、错误描述

    五月 30, 2014 11:52:04 下午 freemarker.log.JDK14LoggerFactory$JDK14Logger error
    严重: Template processing error: "Can't convert the date to string, because it is not known which parts of the date variable are in use. Use ?date, ?time or ?datetime built-in, or ?string.u003Cformat> or ?string(format) built-in with this date."
    
    Can't convert the date to string, because it is not known which parts of the date variable are in use. Use ?date, ?time or ?datetime built-in, or ?string.<format> or ?string(format) built-in with this date.
    The problematic instruction:
    ----------
    ==> ${nowsday} [on line 23, column 6 in type.ftl]
    ----------
    
    Java backtrace for programmers:
    ----------
    freemarker.template.TemplateModelException: Can't convert the date to string, because it is not known which parts of the date variable are in use. Use ?date, ?time or ?datetime built-in, or ?string.<format> or ?string(format) built-in with this date.
    	at freemarker.core.Environment.formatDate(Environment.java:776)
    	at freemarker.core.Expression.getStringValue(Expression.java:105)
    	at freemarker.core.Expression.getStringValue(Expression.java:93)
    	at freemarker.core.DollarVariable.accept(DollarVariable.java:76)
    	at freemarker.core.Environment.visit(Environment.java:221)
    	at freemarker.core.MixedContent.accept(MixedContent.java:92)
    	at freemarker.core.Environment.visit(Environment.java:221)
    	at freemarker.core.Environment.process(Environment.java:199)
    	at freemarker.template.Template.process(Template.java:259)
    	at com.you.freemarker.FreemarkerTemplate.printFtl(FreemarkerTemplate.java:77)
    	at com.you.test.freemarker.FreemarkerTest.studentPrint(FreemarkerTest.java:173)
    	at com.you.test.freemarker.FreemarkerTest.testDataType(FreemarkerTest.java:160)
    	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    	at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
    	at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
    	at java.lang.reflect.Method.invoke(Unknown Source)
    	at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:45)
    	at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15)
    	at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:42)
    	at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:20)
    	at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:28)
    	at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:263)
    	at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:68)
    	at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:47)
    	at org.junit.runners.ParentRunner$3.run(ParentRunner.java:231)
    	at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:60)
    	at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:229)
    	at org.junit.runners.ParentRunner.access$000(ParentRunner.java:50)
    	at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:222)
    	at org.junit.runners.ParentRunner.run(ParentRunner.java:300)
    	at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:50)
    	at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
    	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:467)
    	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683)
    	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390)
    	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197)
    
    <html>
      <head>
        <meta http-equiv="content-type" content="text/html; charset=UTF-8">
        <title>freemarker基本数据类型</title>
    
      </head>
      
      <body>
              张三丰
         
         123,456
         
         true
         false
         
         
    Can't convert the date to string, because it is not known which parts of the date variable are in use. Use ?date, ?time or ?datetime built-in, or ?string.<format> or ?string(format) built-in with this date.
    The problematic instruction:
    ----------
    ==> ${nowsday} [on line 23, column 6 in type.ftl]
    ----------
    
    Java backtrace for programmers:
    ----------
    freemarker.template.TemplateModelException: Can't convert the date to string, because it is not known which parts of the date variable are in use. Use ?date, ?time or ?datetime built-in, or ?string.<format> or ?string(format) built-in with this date.
    	at freemarker.core.Environment.formatDate(Environment.java:776)
    	at freemarker.core.Expression.getStringValue(Expression.java:105)
    	at freemarker.core.Expression.getStringValue(Expression.java:93)
    	at freemarker.core.DollarVariable.accept(DollarVariable.java:76)
    	at freemarker.core.Environment.visit(Environment.java:221)
    	at freemarker.core.MixedContent.accept(MixedContent.java:92)
    	at freemarker.core.Environment.visit(Environment.java:221)
    	at freemarker.core.Environment.process(Environment.java:199)
    	at freemarker.template.Template.process(Template.java:259)
    	at com.you.freemarker.FreemarkerTemplate.printFtl(FreemarkerTemplate.java:77)
    	at com.you.test.freemarker.FreemarkerTest.studentPrint(FreemarkerTest.java:173)
    	at com.you.test.freemarker.FreemarkerTest.testDataType(FreemarkerTest.java:160)
    	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    	at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
    	at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
    	at java.lang.reflect.Method.invoke(Unknown Source)
    	at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:45)
    	at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15)
    	at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:42)
    	at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:20)
    	at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:28)
    	at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:263)
    	at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:68)
    	at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:47)
    	at org.junit.runners.ParentRunner$3.run(ParentRunner.java:231)
    	at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:60)
    	at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:229)
    	at org.junit.runners.ParentRunner.access$000(ParentRunner.java:50)
    	at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:222)
    	at org.junit.runners.ParentRunner.run(ParentRunner.java:300)
    	at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:50)
    	at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
    	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:467)
    	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683)
    	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390)
    	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197)
    
    Can't convert the date to string, because it is not known which parts of the date variable are in use. Use ?date, ?time or ?datetime built-in, or ?string.<format> or ?string(format) built-in with this date.
    The problematic instruction:
    ----------
    ==> ${nowsday} [on line 23, column 6 in type.ftl]
    ----------
    
    Java backtrace for programmers:
    ----------
    freemarker.template.TemplateModelException: Can't convert the date to string, because it is not known which parts of the date variable are in use. Use ?date, ?time or ?datetime built-in, or ?string.<format> or ?string(format) built-in with this date.
    	at freemarker.core.Environment.formatDate(Environment.java:776)
    	at freemarker.core.Expression.getStringValue(Expression.java:105)
    	at freemarker.core.Expression.getStringValue(Expression.java:93)
    	at freemarker.core.DollarVariable.accept(DollarVariable.java:76)
    	at freemarker.core.Environment.visit(Environment.java:221)
    	at freemarker.core.MixedContent.accept(MixedContent.java:92)
    	at freemarker.core.Environment.visit(Environment.java:221)
    	at freemarker.core.Environment.process(Environment.java:199)
    	at freemarker.template.Template.process(Template.java:259)
    	at com.you.freemarker.FreemarkerTemplate.printFtl(FreemarkerTemplate.java:77)
    	at com.you.test.freemarker.FreemarkerTest.studentPrint(FreemarkerTest.java:173)
    	at com.you.test.freemarker.FreemarkerTest.testDataType(FreemarkerTest.java:160)
    	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    	at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
    	at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
    	at java.lang.reflect.Method.invoke(Unknown Source)
    	at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:45)
    	at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15)
    	at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:42)
    	at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:20)
    	at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:28)
    	at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:263)
    	at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:68)
    	at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:47)
    	at org.junit.runners.ParentRunner$3.run(ParentRunner.java:231)
    	at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:60)
    	at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:229)
    	at org.junit.runners.ParentRunner.access$000(ParentRunner.java:50)
    	at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:222)
    	at org.junit.runners.ParentRunner.run(ParentRunner.java:300)
    	at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:50)
    	at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
    	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:467)
    	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683)
    	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390)
    	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197)
    

    2、错误原因

    /**
    	 * freemarker基本数据类型
    	 * @Title:testDataType
    	 * @Description:
    	 * @param:
    	 * @return: void
    	 * @throws
    	 */
    	@Test
    	public void testDataType()
    	{
    		root.put("nowsday", new Date());
    		studentPrint("type.ftl");
    	}

    ${nowsday}


         不能将日期类型直接转换为字符串,因为不知道是日期类型中的哪一种在使用,是date、time还是datetime。并且不知道转换成字符串日期到底显示成什么格式,是yyyy-MM-dd,还是HH:mm:ss,还是yyyy-MM-dd HH:mm:ss


    3、解决办法

     <#--日期类型-->
    ${nowsday?string("yyyy-MM-dd")}


    结果:2014-05-31

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  • 原文地址:https://www.cnblogs.com/hzcya1995/p/13315066.html
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